angularjs add new model property for view - javascript

I am new at angularjs and getting data from api like this:
function response(data){
$scope.data = data
}
<<<< data format is ilke this >>>>>
[
{"id":"1", "name":"item1"},
{"id":"2", "name":"item2"},
{"id":"3", "name":"item3"}
];
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>
Using this in view page with ng-repeat:
<button ng-repeat="item in data">{{item.name}}</button>
I will change selected item button color. But I need selected property on items. But it does not comes from database.
How can I add property named selected to items? in view or in controller?

I think you can use ng-init in repeat as,
<button ng-repeat="item in data" ng-init="item.selected = false">{{item.name}}</button>
this will add a selected property for each and every repeating object with the value of false.

Did you try a simple loop ?
$.each($scope.data, function( index, item ) {
item.selected = false;
});

You can initialize the selected attribute for all data items:
for (var i in data){
data[i].selected = false;
}
and then change it on click:
<button ng-repeat="item in data" ng-click="item.selected=true">{{item.name}}</button>

Related

Angular dynamic checkbox Filtering implementation

thanks in advance
my Requirement is to make a custom filter with name wise search(done) and checkboxes which filters a Table's Rows(array of objects) by matching the checkbox value with the Row['tags'] (array of strings) and returns row if the tags array consist of value in a checkbox ,
The problem is that the filters(checkbox) is obtained from DB and Dynamically populated thus I cannot use ngmodel
Any implementation ideas are highly appreciated, I've seen a lot of questions with static filters and some filters using pipes but how to handle the dynamic case
so far my implementation,
Template:
<div id="searchByTag" *ngFor="let tag of tagList">
<input
type="checkbox"
(change)="filterByTags(tag, $event)"
/>{{ tag }}
</div>
Ts:
rows=[{},{}] //from db
temp = rows // copied when getting row from db
filterByTags(FilterTag, event) {
if (event.target.checked) {
const filteredRow = this.rows.filter((obj) => {
return tag.includes(FilterTag.toLowerCase());
});
this.rows = filteredRow;
} else {
return (this.rows = this.temp);
}
}
a Row object:
{
"xx":'yyy',
....,
"tags" : [
"org",
"pcb",
]
}
other problem is that the filtering technique currently returns only one row which matches the condition (cleared), but the main thing is the dynamic implementation of tags
you can have ngModel:
if this is your checkboxes = ["org", "pcb"];
then all you need is a record to bind checkboxes values to it:
checkboxes: {[id: string]: {value: any}} = {};
for(let tag of this.tags) {
this.checkboxes[tag] = {value: false}
}
now in your template:
<input type="checkbox" *ngFor="let item of tags"
[(ngModel)]="checkboxes[item].value">
you can see this in this stackblitz:
stackblitz

Reset ng-model value from controller after ng-change

How can I reset the value of an ng-model in the controller after an ngChange without using a directive
<div ng-repeat="i in items">
<!-- Some DOM comes here -->
<select ng-model="i.avail" ng-change="changeAvail(i.id, i.avail)">
<option value="true">Available</option>
<option value="false">Unavailable</option>
</select>
<!-- More DOM follows -->
</div>
The Javascript in the controller is as follows
$scope.changeAvail = function(itemId, value){
if(confirm("You cannot undo this action")){
//Send an ajax request to backend for an irreversible action
}
else{
//Restore input to initial value;
}
}
I wouldn't want to implement a directive just for this single occurence
You should Ideally store old value of items inside scope & do use them later to revert back to original one.
$scope.loadItem = function(){
$http.get('/api/getitems').then(function(response){
$scope.items = response.data;
$scope.oldCopy = angular.copy($scope.items); //do it where ever you are setting items
});
}
Then do send whole item to ng-change method like ng-change="changeAvail(i)"
$scope.changeAvail = function(item){
if(confirm("You cannot undo this action")){
//save object
$http.post('/api/data/save', item).then(function(){
//alert('Date saved successfully.');
$scope.loadItem(); //to update items from DB, to make sure items would be updated.
})
}
else{
//get current old object based on itemId, & then do revert it.
var oldItem = $filter('filter')($scope.oldCopy, {itemId: item.itemId}, true)
if(oldItem && oldItem.length){
item = oldItem[0]; //filters return array, so take 1st one while replacing it.
}
}
}

Filter variable not updating in controller angularjs

Hi Im attempting to build functionality around the length of a filter in angularjs, and although its working as it should in the view, in the controller the variable seems to stay outdated...
When I click on the div below it filters a list and calls the filterby function. The output of the length of the newly filtered list updates in the view correctly. However in the function itself I have a log set and it is still showing the old length when I click on the div.
<div ng-repeat="filter in filters" ng-click="filterby(filter.filter_type)">{{filter.filter_type}}</div>
<ul>
<li ng-repeat="event in filtered = (events | filter:query) | orderBy:'-event_date' ">
<span >{{event.event_date}},{{event.event_name}}, {{event.event_venue}}, {{event.event_description}} </span>
</li>
</ul>
<br />Length of filtered items {{filtered.length}}
And my view....
$scope.filterby = function(filterby) {
if (filterby == 'ALL') {
$scope.query = '';
}
else {
$scope.query = filterby;
}
console.log($scope.filtered.length);
};
My filter data:
$scope.filters = [
{'filter_type' : 'ALL'},
{'filter_type' : 'Macnass'}
];
EDIT: Ok its not that it nots working at all, its just showing the previous value, as if its one click behind all the time, so its something to do with the fact that the variable in the view is updated after the list is made. but Im not sure how to go about insuring the variable in the controller is the latest value.
Plunker: http://plnkr.co/edit/u7KpqYx8gDwaaXEvGeMn?p=preview
check out the plunker
added below
$scope.filtered = $filter('filter')($scope.events, $scope.query)
in $scope.filterby function

sub ng-repeats, getting (checked) checkbox values in angular

I have some nested ng-repeats I am working with and the third level down is a grouping of checkboxes. Initially I am sent an array of options for the checkboxes so I do this:
<div class="fadingOptionsHere" ng-repeat="fading in fade.options">
<input type="checkbox" ng-model="fadingsHere" value="{{fading.id}}">{{fading.name}}
</div>
I am tyring to find a way to ONLY get the values of the selected checkboxes back. It would be super ideal if I could just replace the nested options array with an array of only the selected items, so I could just send the json object back like that.
This is the third level down of nesting so I'm having trouble tracking these guys. How would I be able to get only the selected values (as the fading.id) of the select boxes for each iteration of the ng-repeat?
I keep trying to reference the fadingsHere model with no success.
Thanks!
You can do this in this way.
In HTML do like below.
<ul>
<li data-ng-repeat="record in records">
<input type="checkbox" ng-model="selected[record.Id]"> {{record.Id}}
</li>
</ul>
And in controller you have to add selected property.
function MyCtrl($scope) {
$scope.records = [ { "Id": 1, }, { "Id": 2 }, { "Id": 3 } ];
$scope.selected = {};
$scope.ShowSelected = function() {
return $scope.selected
};
When you read the selected property you will get the selected list.
Demo
you could use checklist model directive like
<input type="checkbox" class="form-control"
checklist-model="transaction.jobData[attribute.key]"
checklist-value="checkBoxAttributes.code">

delete row(s) from ng-grid table from button

I have a table with ng-grid, and the problem is that i'm not sure how to collect the selected row(s) id or variable to pass into my delete function.
here is a quick mockup of what i'm trying to do
http://plnkr.co/edit/zy653RrqHmBiRJ7xDHlV?p=preview
the following code is from my html, a clickable delete button that takes in 2 parameters, the array of checkbox ids and the index at the corresponding table. This delete method was obtained from this tutorial : http://alexpotrykus.com/blog/2013/12/07/angularjs-with-rails-4-part-1/
<div class="btn-group">
<button class="my-btn btn-default button-row-provider-medical-services" ng-click="deleteProviderMedicalService([], $index)">Delete</button>
</button>
</div>
<div class="gridStyle ngGridTable" ng-grid="gridOptions">
</div>
The following code grabs the json data from a url, queries it and returns it. It also contains the delete function that gets called from the controller in the html page.
app.factory('ProviderMedicalService', ['$resource', function($resource) {
function ProviderMedicalService() {
this.service = $resource('/api/provider_medical_services/:providerMedicalServiceId', {providerMedicalServiceId: '#id'});
};
ProviderMedicalService.prototype.all = function() {
return this.service.query();
};
ProviderMedicalService.prototype.delete = function(providerId) {
this.service.remove({providerMedicalServiceId: providerId});
};
return new ProviderMedicalService;
}]);
The following is my controller(not everything, just the most important bits). $scope.provider_medical_services gets the json data and puts it into the ng-grid gridOptions.
After reading the ng-grid docs, i must somehow pass the checkbox ids from the selectedItems array and pass it into html doc to the delete function. Or, i'm just doing this completely wrong, as i hacked this together. Solutions and suggestions are greatly appreciated
(function() {
app.controller('ModalDemoCtrl', ['$scope', 'ProviderMedicalService', '$resource', '$modal', function($scope, ProviderMedicalService, $resource, $modal) {
var checkBoxCellTemplate = '<div class="ngSelectionCell"><input tabindex="-1" class="ngSelectionCheckbox" type="checkbox" ng-checked="row.selected" /></div>';
$scope.provider_medical_services = ProviderMedicalService.all();
$scope.deleteProviderMedicalService = function(ids,idx) {
$scope.provider_medical_services.splice(idx, 1);
return ProviderMedicalService.delete(ids);
};
$scope.gridOptions = {
columnDefs: [
{
cellTemplate: checkBoxCellTemplate,
showSelectionCheckbox: true
},{
field: 'name',
displayName: 'CPT Code/Description'
},{
field: 'cash_price',
displayName: 'Cash Price'
},{
field: 'average_price',
displayName: 'Average Price'
},
],
data: 'provider_medical_services',
selectedItems: []
};
i think the easiest option is pass an (array index) as data-id to your dom, which u can pick it from there.
{{$index}} is a variable you can use in ng-repeat
======= ignore what i said above, since i normaly writes my own custom stuff ======
I just had a look at ng-grid, i took their example. i've added a delete all selected function, as well as someone elses delete current row function ( these is pure angular way ) to see the code, hover over the top right corner < edit in jsbin >
http://jsbin.com/huyodove/1/
Honestsly i don't like it this way, you would be better off use something like lodash to manage your arrays and do your own custom grid. Using foreach to find the row index isn't good performance.
In their doc, it says you can change the row template, and which you should, so you can add the {{index}} to that row, and filter your data through that index rather which is a little bit better. anyway beware of deleting cells after you have filter your table.
I don't quite get much your question, but you can access to selectedItems of ng-grid as following: $scope.gridOptions.$gridScope.selectedItems (see ng-grid API for more information, but technically this array holds the list of selected items in multiple mode - or only one item in single mode)
For your case, the deleteAll() function could be someething like this:
$scope.deleteAll = function() {
$scope.myData = [];
}
The delete() function which delete selected items can be:
$scope.delete = function() {
$.each($scope.gridOptions.$gridScope.selectedItems, function(index, selectedItem) {
//remove the selected item from 'myData' - it is 2-ways binding to any modification to myData will be reflected in ng-grid table
//you could check by either name or unique id of item
});
}

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